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【简答题】
Only when we saw the photos about the air crash_____ how terrible it was. A had we known B we had known C did we know D we knew
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【单选题】Thousands of Irish people starved because __________ 查看材料
A.
they depended on the potato
B.
they were forced to move to America
C.
the weather conditions in Ireland were not fit for growing the potato
D.
the potato harvest was bad
【单选题】如图所示电路中含有理想变压器,一次侧匝数为N1,二次侧匝数为N2,n=N1/N2。当一次侧由电流源is激励时,在保持一次侧匝数不变的前提下,若要使得R2上的功率增加,二次侧匝数N2应_________【图片】
A.
增加
B.
减少
C.
不变
D.
不能确定
【单选题】设计一个如图所示的电路, a 表示定值电阻, b 表示滑动变阻器,电源电压保持不变。其中, a 可以有阻值分别为 R1 、 R2 的两个定值电阻可供选择, b 可以有最大阻值分别为 R3 、 R4 的两个滑动变阻器可供选择,且 R1
A.
a选R1,b选R4
B.
a选R1,b选R3
C.
a选R2,b选R3
D.
a选R2,b选R4
【判断题】钻芯法检测混凝土强度,单个构件的混凝土强度推定值可取芯样试件混凝土强度换算值中最小值。()
A.
正确
B.
错误
【单选题】终碛堤是冰川携带物堆积在冰川末端形成的堤状堆积体。当冰川融水流过终碛堤后,冰水携带大量碎屑物质堆积成扇形堆积体,称为冰水扇。下图示意终碛堤及冰水扇,据此回答17-18题。 冰川沉积物具有的特点是( )
A.
大小均匀
B.
层状结构
C.
棱角明显
D.
磨圆度好
【单选题】终碛堤是冰川携带物堆积在冰川末端形成的堤状堆积体。当冰川融水流过终碛堤后,冰水携带大量碎屑物质堆积成扇形堆积体,称为冰水扇。下图示意终碛堤及冰水扇,据此完成第1-2题。 1. 终碛堤沉积物具有的特点是( )
A.
大小均匀
B.
层状结构
C.
棱角明显
D.
磨圆度好
【简答题】回弹法检测单个构件混凝土强度时,结构或构件的混凝土强度推定值等于构件中最小的测区混凝土强度换算值。( )
【单选题】In every cultivated language there are two great classes of words, which makes up the whole vocabulary. First, there are those words 56 which we become familiar in daily conversation, which we 57 , th...
A.
at
B.
with
C.
by
D.
through
【简答题】Starved for two whole days, they are a plague of locusts _________all the plates of food with one bite.
【简答题】Thousands of Irish people starved during the “Potato Famine” because
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